The role of the pion in the lineshape of the $X(3872)$

Angelo Esposito, Davide Germani, Alfredo Glioti +3

We determine the contribution of long-range pion interactions to the $X(3872)$ dynamics, assuming it is a loosely bound $D^0{\bar{D}}^{\ast 0}$ molecule. Our result is based on the dist…